Automation System
What is the difference between integral and derivative control?

derivative control responds to a change in the rate of change in the error signal
All of these
integral control has slower response to an error signal.
derivative control does not eliminate offset error
None of these

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Automation System
A venturi tube:

measures the presence of a liquid
None of these
is made only of metal
can be used to measure gas or liquid flow rates
is extremely difficult to use

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